These requirements allow the precise preparation of an optimal feed to support the animal. The requirements are oriented on the required nutrition – providing more nutrition than required make no economic sense, but providing less nutrients can be negative to the health of the animal. Quality and safety Economic goals are an important factor in livestock farming, but not the only one. Legal bodies (such as the government and industrial bodies) set quality standards that are legally binding to any livestock producing company. In addition, societal standards are followed. 'Quality' in this context includes: the quality of used ingredients the quality of animal keeping the quality of the processes One example for issues with quality of ingredients is the (nowadays often illegal) use of meat and bone meal for ruminant animals. Ecological livestock farming Selecting the "right" ingredients can have a positive effect on the environment pollution. It has been shown that optimizing the feed this can reduce nitrogen and phosphorus found in the excrements of pigs. Tools PLF starts with consistently collecting information about each animal. For this, there are several technologies: unique ID, electronic wearables to identify illness and other issues, software, cameras, etc. Each animal requires a unique number (typically by means of an ear tag). This can be utilized through a visual ID, passive electronic ID tag or an active electronic ID tag. For example, at birth, the farmer selects "Birth" from the menu on the reader, after which the interactive screen requests the user to read the tag of the mother. Next, tags are inserted in the ears of newborns and read. With this simple action, important information is recorded, such as: Which animal is the mother, How many animals were delivered, What the sex of the animals is, A date of birth. Electronic wearable devices such as an active smart ear tag can get data from individual animals such as temperature and activity patterns. This data can be utilized in identification of illness, heat stress, oestrous, etc. This enables individualized care for the animals and methods to lower stress upon them. The end result is judicious use of drug treatments and nutrition to bolster healthy growth. This provides livestock producers with the tools to identify sick animals sooner and more accurately. This early detection leads to reduction in costs by lowering re-treatment rate and death loss, and getting animals back to peak performance faster.